Direction: Select the option that expresses the given sentence in positive degree of comparison. He was greater than any other physiologist of the century.

Explanation

The correct answer is "No other physiologist of the century was as great as he was." Key Points The given sentence is in a comparative degree, comparing the greatness of the mentioned physiologist to all other physiologists of the century. To convert it to a positive degree, we need to state that the mentioned physiologist was the greatest of all. The correct option, Option 4, does this by stating that no other physiologist of the century was as great as he was. Option 1 is incorrect as it states that all other physiologists were as great as him, which is not the intended meaning of the sentence. Option 2 is the correct positive degree form, but it is not an exact rephrasing of the given sentence, which makes it less suitable than Option 4. Option 3 is incorrect as it narrows down the comparison to only the country, while the original sentence compares the mentioned physiologist to all other physiologists of the century. The correct answer is Option 4. Correct sentence: No other physiologist of the century was as great as he was.